User blog comment:Shadowlordgamer1/My trading shop!/@comment-34196122-20180304200550/@comment-31267872-20180305212531

Female Combees aren't super rare, you can just breed about 8 times, and theoretically you should get one female Combee. Obviously, the game isn't hardwired to give you one female Combee in every 8 Combees, but it should roughly do that.

Also, you can catch Marills as Marills in the wild, and if you don't have the proper Incense, they'll hatch as Marills. That doesn't mean it'll always change gender, and that point also has just about nothing to do with the shop. It is still possible to get female Marills, it's a 50/50 chance for Marill itself, just Azurill has a 75/25 male-female ratio.